Q:

What causes an automatic transmission to stop shifting gears?

A:

Quick Answer

If an automatic transmission has trouble shifting gears, it could be because the transmission fluid is low, the fluid is the wrong viscosity or the throttle cables need adjusting. If these factors are not the problem, then it is best to take the vehicle to a licensed mechanic for service.

Continue Reading
What causes an automatic transmission to stop shifting gears?
Credit: Bryan Mullennix Photographer's Choice Getty Images

Full Answer

The first thing to check when an automatic transmission has trouble shifting is the transmission fluid. If it's low, one should refill it. If it's not the fluid, one should check if the fluid is the right thickness based on the owner's manual recommendation. If it's too thick, it prevents the fluid from flowing properly and will cause shifting problems. Finally, one should check the throttle cables. One should be sure the cables are properly secured and then test drive the vehicle again. If the vehicle still has a problem, it could be a much larger issue that requires service.

Learn more about Car Parts & Maintenance

Related Questions

  • Q:

    What does it mean when my car jerks when changing gears?

    A:

    When a car jerks while changing gears, it means that the transmission is malfunctioning. There are several different reasons a transmission fails to work correctly. For example, low transmission fuel and a leak in the transmission both cause a transmission to malfunction. It is also possible that a transmission is worn out and needs to be replaced.

    Full Answer >
  • Q:

    What happens when my transmission fluid is low?

    A:

    When transmission fluid is low, the transmission tends to jerk or slip when changing gears. The vehicle may also speed to high revolutions per minute while in neutral or without the vehicle speeding up or spontaneously slip out of gear. A burning smell is another sign that transmission fluid may be low.

    Full Answer >
    Filed Under:
  • Q:

    What will dirty transmission fluid do to a car?

    A:

    Dirty transmission fluid causes problems when shifting gears: grinding noises, stalling or misfiring of the engine and overheating of the transmission. These problems are very similar to those caused by low transmission fluid.

    Full Answer >
    Filed Under:
  • Q:

    How do hydrostatic drives work in lawn mowers?

    A:

    Rather than using gears to transmit power, as in a typical transmission, a hydrostatic transmission transfers power by pressurizing hydraulic fluid using a small motor connected to the engine's crankshaft. Hydrostatic drives, or hydrostatic transmissions, are often used on lawn mowers and garden tractors.

    Full Answer >
    Filed Under:

Explore